insulator /ˈɪn.s(j)ə.leɪ.tə(ɹ)/ noun3 •A substance that does not transmit heat (thermal insulator), sound (acoustic insulator) or electricity (electrical insulator). •A non-conductive structure, coating or device that does not transmit sound, heat or electricity (see image)To isolate electrical wires from the pylons supporting them, one often uses glass insulators. •A person who installs insulation. formsinsulators
